WOUND MULTI-PLY TUBE, METHOD OF MANUFACTURING WOUND MULTI-PLY TUBE, AND DEVICE FOR MANUFACTURING WOUND MULTI-PLY TUBE

摘要

A wound multi-ply tube (10) comprises: a tube body (12) formed by winding into a roll-shape a metal plate (13) configured to include a core material layer (18) formed using a metal material, and a brazing material layer (20) formed using a metal material having a lower melting point than the core material layer (18); and a joint portion (14) which is formed where parts of the metal plate (13) have been wound over one another, and in which the parts of the metal plate (13) that have been wound over one another are brazed together by means of the brazing material layer (20) which is melted by the heat of a laser (L) with which the tube body (12) is irradiated.